Super Mario Crossover
While browsing Gamefly.com, considering resubscribing, I came across a fun little web-based game: Super Mario Crossover. It allows you to play Super Mario Bros with characters other than Mario: Link, Samus, Simon Belmont, Mega Man, and Bill from Contra. It’s a very well done mashup.
Kudos to Gamefly for hosting this and a handful of other free games in their new Arcade section. After a bit of searching, I found the same game on other sites as well (including its own), but I found it first on Gamefly.